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Ridge loading zigzag waveguide slow wave line

A meandering waveguide and slow wave line technology, applied in the field of traveling wave tube amplifier devices, can solve the problems such as the limitation of the gain and efficiency of the traveling wave tube, the low coupling impedance of the meandering waveguide slow wave structure, etc.

Inactive Publication Date: 2010-02-17
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

According to the existing domestic and foreign related experimental reports, due to the low coupling impedance of the meander waveguide slow-wave structure, the overall gain and efficiency of the TWT are limited.

Method used

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  • Ridge loading zigzag waveguide slow wave line
  • Ridge loading zigzag waveguide slow wave line
  • Ridge loading zigzag waveguide slow wave line

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Experimental program
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Embodiment Construction

[0020] specific implementation plan

[0021] Such as Figure 4 and Figure 5 , in the 8mm millimeter wave band, the structural dimensions of the specific scheme of the meandering double-ridge waveguide slow wave line are as follows (unit: mm): a=5, b=0.8, L=4.56, H=2.2, r 0 =0.5, w=5, d=0.25, h=2.2. Use three-dimensional electromagnetic simulation software to simulate the ridge-loaded meander waveguide slow-wave line provided by the present invention, obtain its dispersion characteristics and coupling impedance, and compare it with the meandering double-ridge slow-wave structure and ordinary meander waveguide slow-wave line. The simulation results are as follows Figure 6 and Figure 7 shown. Curve 5 and Curve 8 are the dispersion characteristic curve and coupling impedance curve of the ordinary meandering waveguide slow-wave structure respectively, Curve 6 and Curve 9 are the dispersion characteristic curve and coupling impedance curve of the meandering double-ridge waveg...

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Abstract

The invention relates to a ridge loading zigzag waveguide slow wave line which belongs to the technical field of microwave vacuum electrons and relates to a traveling wave tube amplification device. The device is formed by connecting a series of arc bending waveguides (or right-angle bending waveguides) and straight waveguides end to end, i.e. bending rectangular waveguides into a U-shaped zigzagline (or a right-angle zigzag line) periodically along the electric field surface, so as to form a zigzag waveguide structure. A metal ridge sheet with a certain thickness is loaded on the inner wallsof the straight waveguides of each zigzag unit, and the waveguide walls and the metal ridge sheets are provided with round through holes along the position of a middle axle symmetric line of a slow wave structure, wherein the round through holes of the straight waveguides of two adjacent zigzag units are connected through a metal pipe with an aperture size the same as the aperture size of the round through hole so as to form an electron bunch passage. The invention can improve the coupling impedance of a zigzag waveguide slow wave system, thereby ensuring that a zigzag waveguide traveling wave tube has higher gain and efficiency.

Description

technical field [0001] The invention belongs to the technical field of microwave vacuum electronics, and relates to a traveling wave tube amplifier. Background technique [0002] As the most widely used electric vacuum device in the microwave frequency band, the traveling wave tube has advantages that other devices cannot match. The slow wave line is the core component of the beam-wave interaction in the traveling wave tube, and its performance directly determines the technical level of the traveling wave tube. Helixes and coupled cavities have been the most widely used slow wave systems in traveling wave tubes. Although the helical TWT has a bandwidth of more than an octave, the output power is limited by the heat dissipation capability; especially when the TWT works in the short centimeter and millimeter wave bands, due to the extremely small lateral size of the helix, it is difficult to dissipate heat. Its power capacity is smaller. Although the coupled cavity travelin...

Claims

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Application Information

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IPC IPC(8): H01J23/24
Inventor 何俊魏彦玉宫玉彬王文祥黄明智
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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